mirror of
https://github.com/classilla/tenfourfox.git
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816 lines
27 KiB
C++
816 lines
27 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FrameAnimator.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Move.h"
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#include "imgIContainer.h"
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#include "LookupResult.h"
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#include "MainThreadUtils.h"
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#include "RasterImage.h"
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#include "pixman.h"
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namespace mozilla {
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using namespace gfx;
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namespace image {
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int32_t
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FrameAnimator::GetSingleLoopTime() const
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{
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// If we aren't done decoding, we don't know the image's full play time.
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if (!mDoneDecoding) {
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return -1;
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}
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// If we're not looping, a single loop time has no meaning
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if (mAnimationMode != imgIContainer::kNormalAnimMode) {
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return -1;
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}
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uint32_t looptime = 0;
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for (uint32_t i = 0; i < mImage->GetNumFrames(); ++i) {
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int32_t timeout = GetTimeoutForFrame(i);
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if (timeout >= 0) {
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looptime += static_cast<uint32_t>(timeout);
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} else {
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// If we have a frame that never times out, we're probably in an error
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// case, but let's handle it more gracefully.
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NS_WARNING("Negative frame timeout - how did this happen?");
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return -1;
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}
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}
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return looptime;
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}
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TimeStamp
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FrameAnimator::GetCurrentImgFrameEndTime() const
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{
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TimeStamp currentFrameTime = mCurrentAnimationFrameTime;
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int32_t timeout =
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GetTimeoutForFrame(mCurrentAnimationFrameIndex);
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if (timeout < 0) {
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// We need to return a sentinel value in this case, because our logic
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// doesn't work correctly if we have a negative timeout value. We use
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// one year in the future as the sentinel because it works with the loop
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// in RequestRefresh() below.
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// XXX(seth): It'd be preferable to make our logic work correctly with
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// negative timeouts.
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return TimeStamp::NowLoRes() +
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TimeDuration::FromMilliseconds(31536000.0);
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}
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TimeDuration durationOfTimeout =
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TimeDuration::FromMilliseconds(static_cast<double>(timeout));
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TimeStamp currentFrameEndTime = currentFrameTime + durationOfTimeout;
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return currentFrameEndTime;
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}
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FrameAnimator::RefreshResult
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FrameAnimator::AdvanceFrame(TimeStamp aTime)
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{
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NS_ASSERTION(aTime <= TimeStamp::Now(),
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"Given time appears to be in the future");
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PROFILER_LABEL_FUNC(js::ProfileEntry::Category::GRAPHICS);
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uint32_t currentFrameIndex = mCurrentAnimationFrameIndex;
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uint32_t nextFrameIndex = currentFrameIndex + 1;
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int32_t timeout = 0;
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RefreshResult ret;
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RawAccessFrameRef nextFrame = GetRawFrame(nextFrameIndex);
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// If we're done decoding, we know we've got everything we're going to get.
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// If we aren't, we only display fully-downloaded frames; everything else
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// gets delayed.
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bool canDisplay = mDoneDecoding ||
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(nextFrame && nextFrame->IsImageComplete());
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if (!canDisplay) {
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// Uh oh, the frame we want to show is currently being decoded (partial)
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// Wait until the next refresh driver tick and try again
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return ret;
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}
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// If we're done decoding the next frame, go ahead and display it now and
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// reinit with the next frame's delay time.
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if (mImage->GetNumFrames() == nextFrameIndex) {
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// End of an animation loop...
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// If we are not looping forever, initialize the loop counter
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if (mLoopRemainingCount < 0 && LoopCount() >= 0) {
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mLoopRemainingCount = LoopCount();
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}
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// If animation mode is "loop once", or we're at end of loop counter,
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// it's time to stop animating.
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if (mAnimationMode == imgIContainer::kLoopOnceAnimMode ||
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mLoopRemainingCount == 0) {
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ret.animationFinished = true;
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}
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nextFrameIndex = 0;
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if (mLoopRemainingCount > 0) {
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mLoopRemainingCount--;
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}
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// If we're done, exit early.
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if (ret.animationFinished) {
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return ret;
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}
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}
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timeout = GetTimeoutForFrame(nextFrameIndex);
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// Bad data
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if (timeout < 0) {
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ret.animationFinished = true;
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ret.error = true;
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}
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if (nextFrameIndex == 0) {
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ret.dirtyRect = mFirstFrameRefreshArea;
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} else {
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// Change frame
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if (nextFrameIndex != currentFrameIndex + 1) {
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nextFrame = GetRawFrame(nextFrameIndex);
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}
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if (!DoBlend(&ret.dirtyRect, currentFrameIndex,
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nextFrameIndex)) {
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// something went wrong, move on to next
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NS_WARNING("FrameAnimator::AdvanceFrame(): Compositing of frame failed");
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nextFrame->SetCompositingFailed(true);
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mCurrentAnimationFrameTime = GetCurrentImgFrameEndTime();
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mCurrentAnimationFrameIndex = nextFrameIndex;
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ret.error = true;
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return ret;
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}
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nextFrame->SetCompositingFailed(false);
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}
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mCurrentAnimationFrameTime = GetCurrentImgFrameEndTime();
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// If we can get closer to the current time by a multiple of the image's loop
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// time, we should.
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uint32_t loopTime = GetSingleLoopTime();
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if (loopTime > 0) {
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TimeDuration delay = aTime - mCurrentAnimationFrameTime;
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if (delay.ToMilliseconds() > loopTime) {
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// Explicitly use integer division to get the floor of the number of
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// loops.
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uint32_t loops = static_cast<uint32_t>(delay.ToMilliseconds()) / loopTime;
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mCurrentAnimationFrameTime +=
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TimeDuration::FromMilliseconds(loops * loopTime);
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}
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}
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// Set currentAnimationFrameIndex at the last possible moment
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mCurrentAnimationFrameIndex = nextFrameIndex;
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// If we're here, we successfully advanced the frame.
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ret.frameAdvanced = true;
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return ret;
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}
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FrameAnimator::RefreshResult
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FrameAnimator::RequestRefresh(const TimeStamp& aTime)
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{
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// only advance the frame if the current time is greater than or
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// equal to the current frame's end time.
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TimeStamp currentFrameEndTime = GetCurrentImgFrameEndTime();
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// By default, an empty RefreshResult.
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RefreshResult ret;
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while (currentFrameEndTime <= aTime) {
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TimeStamp oldFrameEndTime = currentFrameEndTime;
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RefreshResult frameRes = AdvanceFrame(aTime);
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// Accumulate our result for returning to callers.
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ret.Accumulate(frameRes);
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currentFrameEndTime = GetCurrentImgFrameEndTime();
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// if we didn't advance a frame, and our frame end time didn't change,
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// then we need to break out of this loop & wait for the frame(s)
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// to finish downloading
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if (!frameRes.frameAdvanced && (currentFrameEndTime == oldFrameEndTime)) {
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break;
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}
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}
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return ret;
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}
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void
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FrameAnimator::ResetAnimation()
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{
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mCurrentAnimationFrameIndex = 0;
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mLastCompositedFrameIndex = -1;
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}
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void
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FrameAnimator::SetDoneDecoding(bool aDone)
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{
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mDoneDecoding = aDone;
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}
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void
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FrameAnimator::SetAnimationMode(uint16_t aAnimationMode)
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{
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mAnimationMode = aAnimationMode;
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}
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void
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FrameAnimator::InitAnimationFrameTimeIfNecessary()
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{
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if (mCurrentAnimationFrameTime.IsNull()) {
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mCurrentAnimationFrameTime = TimeStamp::Now();
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}
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}
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void
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FrameAnimator::SetAnimationFrameTime(const TimeStamp& aTime)
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{
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mCurrentAnimationFrameTime = aTime;
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}
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void
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FrameAnimator::UnionFirstFrameRefreshArea(const nsIntRect& aRect)
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{
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mFirstFrameRefreshArea.UnionRect(mFirstFrameRefreshArea, aRect);
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}
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uint32_t
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FrameAnimator::GetCurrentAnimationFrameIndex() const
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{
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return mCurrentAnimationFrameIndex;
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}
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nsIntRect
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FrameAnimator::GetFirstFrameRefreshArea() const
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{
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return mFirstFrameRefreshArea;
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}
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LookupResult
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FrameAnimator::GetCompositedFrame(uint32_t aFrameNum)
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{
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MOZ_ASSERT(aFrameNum != 0, "First frame is never composited");
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// If we have a composited version of this frame, return that.
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if (mLastCompositedFrameIndex == int32_t(aFrameNum)) {
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return LookupResult(mCompositingFrame->DrawableRef(), MatchType::EXACT);
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}
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// Otherwise return the raw frame. DoBlend is required to ensure that we only
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// hit this case if the frame is not paletted and doesn't require compositing.
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LookupResult result =
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SurfaceCache::Lookup(ImageKey(mImage),
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RasterSurfaceKey(mSize,
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DefaultSurfaceFlags(),
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aFrameNum));
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MOZ_ASSERT(!result || !result.DrawableRef()->GetIsPaletted(),
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"About to return a paletted frame");
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return result;
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}
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int32_t
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FrameAnimator::GetTimeoutForFrame(uint32_t aFrameNum) const
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{
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int32_t rawTimeout = 0;
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RawAccessFrameRef frame = GetRawFrame(aFrameNum);
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if (frame) {
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AnimationData data = frame->GetAnimationData();
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rawTimeout = data.mRawTimeout;
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} else if (aFrameNum == 0) {
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rawTimeout = mFirstFrameTimeout;
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} else {
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NS_WARNING("No frame; called GetTimeoutForFrame too early?");
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return 100;
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}
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// Ensure a minimal time between updates so we don't throttle the UI thread.
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// consider 0 == unspecified and make it fast but not too fast. Unless we
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// have a single loop GIF. See bug 890743, bug 125137, bug 139677, and bug
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// 207059. The behavior of recent IE and Opera versions seems to be:
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// IE 6/Win:
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// 10 - 50ms go 100ms
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// >50ms go correct speed
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// Opera 7 final/Win:
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// 10ms goes 100ms
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// >10ms go correct speed
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// It seems that there are broken tools out there that set a 0ms or 10ms
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// timeout when they really want a "default" one. So munge values in that
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// range.
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if (rawTimeout >= 0 && rawTimeout <= 10) {
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return 100;
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}
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return rawTimeout;
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}
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static void
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DoCollectSizeOfCompositingSurfaces(const RawAccessFrameRef& aSurface,
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SurfaceMemoryCounterType aType,
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nsTArray<SurfaceMemoryCounter>& aCounters,
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MallocSizeOf aMallocSizeOf)
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{
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// Concoct a SurfaceKey for this surface.
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SurfaceKey key = RasterSurfaceKey(aSurface->GetImageSize(),
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DefaultSurfaceFlags(),
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/* aFrameNum = */ 0);
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// Create a counter for this surface.
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SurfaceMemoryCounter counter(key, /* aIsLocked = */ true, aType);
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// Extract the surface's memory usage information.
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size_t heap = 0, nonHeap = 0;
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aSurface->AddSizeOfExcludingThis(aMallocSizeOf, heap, nonHeap);
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counter.Values().SetDecodedHeap(heap);
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counter.Values().SetDecodedNonHeap(nonHeap);
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// Record it.
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aCounters.AppendElement(counter);
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}
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void
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FrameAnimator::CollectSizeOfCompositingSurfaces(
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nsTArray<SurfaceMemoryCounter>& aCounters,
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MallocSizeOf aMallocSizeOf) const
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{
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if (mCompositingFrame) {
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DoCollectSizeOfCompositingSurfaces(mCompositingFrame,
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SurfaceMemoryCounterType::COMPOSITING,
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aCounters,
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aMallocSizeOf);
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}
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if (mCompositingPrevFrame) {
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DoCollectSizeOfCompositingSurfaces(mCompositingPrevFrame,
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SurfaceMemoryCounterType::COMPOSITING_PREV,
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aCounters,
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aMallocSizeOf);
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}
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}
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RawAccessFrameRef
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FrameAnimator::GetRawFrame(uint32_t aFrameNum) const
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{
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LookupResult result =
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SurfaceCache::Lookup(ImageKey(mImage),
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RasterSurfaceKey(mSize,
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DefaultSurfaceFlags(),
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aFrameNum));
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return result ? result.DrawableRef()->RawAccessRef()
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: RawAccessFrameRef();
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}
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//******************************************************************************
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// DoBlend gets called when the timer for animation get fired and we have to
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// update the composited frame of the animation.
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bool
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FrameAnimator::DoBlend(nsIntRect* aDirtyRect,
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uint32_t aPrevFrameIndex,
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uint32_t aNextFrameIndex)
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{
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RawAccessFrameRef prevFrame = GetRawFrame(aPrevFrameIndex);
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RawAccessFrameRef nextFrame = GetRawFrame(aNextFrameIndex);
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MOZ_ASSERT(prevFrame && nextFrame, "Should have frames here");
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AnimationData prevFrameData = prevFrame->GetAnimationData();
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if (prevFrameData.mDisposalMethod == DisposalMethod::RESTORE_PREVIOUS &&
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!mCompositingPrevFrame) {
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prevFrameData.mDisposalMethod = DisposalMethod::CLEAR;
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}
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bool isFullPrevFrame = prevFrameData.mRect.x == 0 &&
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prevFrameData.mRect.y == 0 &&
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prevFrameData.mRect.width == mSize.width &&
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prevFrameData.mRect.height == mSize.height;
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// Optimization: DisposeClearAll if the previous frame is the same size as
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// container and it's clearing itself
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if (isFullPrevFrame &&
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(prevFrameData.mDisposalMethod == DisposalMethod::CLEAR)) {
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prevFrameData.mDisposalMethod = DisposalMethod::CLEAR_ALL;
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}
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AnimationData nextFrameData = nextFrame->GetAnimationData();
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bool isFullNextFrame = nextFrameData.mRect.x == 0 &&
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nextFrameData.mRect.y == 0 &&
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nextFrameData.mRect.width == mSize.width &&
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nextFrameData.mRect.height == mSize.height;
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if (!nextFrame->GetIsPaletted()) {
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// Optimization: Skip compositing if the previous frame wants to clear the
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// whole image
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if (prevFrameData.mDisposalMethod == DisposalMethod::CLEAR_ALL) {
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aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
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return true;
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}
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// Optimization: Skip compositing if this frame is the same size as the
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// container and it's fully drawing over prev frame (no alpha)
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if (isFullNextFrame &&
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(nextFrameData.mDisposalMethod != DisposalMethod::RESTORE_PREVIOUS) &&
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!nextFrameData.mHasAlpha) {
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aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
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return true;
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}
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}
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// Calculate area that needs updating
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switch (prevFrameData.mDisposalMethod) {
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default:
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MOZ_ASSERT_UNREACHABLE("Unexpected DisposalMethod");
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case DisposalMethod::NOT_SPECIFIED:
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case DisposalMethod::KEEP:
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*aDirtyRect = nextFrameData.mRect;
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break;
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case DisposalMethod::CLEAR_ALL:
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// Whole image container is cleared
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aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
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break;
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case DisposalMethod::CLEAR:
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// Calc area that needs to be redrawn (the combination of previous and
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// this frame)
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// XXX - This could be done with multiple framechanged calls
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// Having prevFrame way at the top of the image, and nextFrame
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// way at the bottom, and both frames being small, we'd be
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// telling framechanged to refresh the whole image when only two
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// small areas are needed.
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aDirtyRect->UnionRect(nextFrameData.mRect, prevFrameData.mRect);
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break;
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case DisposalMethod::RESTORE_PREVIOUS:
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aDirtyRect->SetRect(0, 0, mSize.width, mSize.height);
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break;
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}
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// Optimization:
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// Skip compositing if the last composited frame is this frame
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// (Only one composited frame was made for this animation. Example:
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// Only Frame 3 of a 10 frame image required us to build a composite frame
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// On the second loop, we do not need to rebuild the frame
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// since it's still sitting in compositingFrame)
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if (mLastCompositedFrameIndex == int32_t(aNextFrameIndex)) {
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return true;
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}
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bool needToBlankComposite = false;
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// Create the Compositing Frame
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if (!mCompositingFrame) {
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RefPtr<imgFrame> newFrame = new imgFrame;
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nsresult rv = newFrame->InitForDecoder(mSize,
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SurfaceFormat::B8G8R8A8);
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if (NS_FAILED(rv)) {
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mCompositingFrame.reset();
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return false;
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}
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mCompositingFrame = newFrame->RawAccessRef();
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needToBlankComposite = true;
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} else if (int32_t(aNextFrameIndex) != mLastCompositedFrameIndex+1) {
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// If we are not drawing on top of last composited frame,
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// then we are building a new composite frame, so let's clear it first.
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needToBlankComposite = true;
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}
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AnimationData compositingFrameData = mCompositingFrame->GetAnimationData();
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// More optimizations possible when next frame is not transparent
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// But if the next frame has DisposalMethod::RESTORE_PREVIOUS,
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// this "no disposal" optimization is not possible,
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// because the frame in "after disposal operation" state
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// needs to be stored in compositingFrame, so it can be
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// copied into compositingPrevFrame later.
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bool doDisposal = true;
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if (!nextFrameData.mHasAlpha &&
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nextFrameData.mDisposalMethod != DisposalMethod::RESTORE_PREVIOUS) {
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if (isFullNextFrame) {
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// Optimization: No need to dispose prev.frame when
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// next frame is full frame and not transparent.
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doDisposal = false;
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// No need to blank the composite frame
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needToBlankComposite = false;
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} else {
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if ((prevFrameData.mRect.x >= nextFrameData.mRect.x) &&
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(prevFrameData.mRect.y >= nextFrameData.mRect.y) &&
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(prevFrameData.mRect.x + prevFrameData.mRect.width <=
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nextFrameData.mRect.x + nextFrameData.mRect.width) &&
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(prevFrameData.mRect.y + prevFrameData.mRect.height <=
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nextFrameData.mRect.y + nextFrameData.mRect.height)) {
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// Optimization: No need to dispose prev.frame when
|
|
// next frame fully overlaps previous frame.
|
|
doDisposal = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (doDisposal) {
|
|
// Dispose of previous: clear, restore, or keep (copy)
|
|
switch (prevFrameData.mDisposalMethod) {
|
|
case DisposalMethod::CLEAR:
|
|
if (needToBlankComposite) {
|
|
// If we just created the composite, it could have anything in its
|
|
// buffer. Clear whole frame
|
|
ClearFrame(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
} else {
|
|
// Only blank out previous frame area (both color & Mask/Alpha)
|
|
ClearFrame(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect,
|
|
prevFrameData.mRect);
|
|
}
|
|
break;
|
|
|
|
case DisposalMethod::CLEAR_ALL:
|
|
ClearFrame(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
break;
|
|
|
|
case DisposalMethod::RESTORE_PREVIOUS:
|
|
// It would be better to copy only the area changed back to
|
|
// compositingFrame.
|
|
if (mCompositingPrevFrame) {
|
|
AnimationData compositingPrevFrameData =
|
|
mCompositingPrevFrame->GetAnimationData();
|
|
|
|
CopyFrameImage(compositingPrevFrameData.mRawData,
|
|
compositingPrevFrameData.mRect,
|
|
compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
|
|
// destroy only if we don't need it for this frame's disposal
|
|
if (nextFrameData.mDisposalMethod !=
|
|
DisposalMethod::RESTORE_PREVIOUS) {
|
|
mCompositingPrevFrame.reset();
|
|
}
|
|
} else {
|
|
ClearFrame(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
MOZ_ASSERT_UNREACHABLE("Unexpected DisposalMethod");
|
|
case DisposalMethod::NOT_SPECIFIED:
|
|
case DisposalMethod::KEEP:
|
|
// Copy previous frame into compositingFrame before we put the new
|
|
// frame on top
|
|
// Assumes that the previous frame represents a full frame (it could be
|
|
// smaller in size than the container, as long as the frame before it
|
|
// erased itself)
|
|
// Note: Frame 1 never gets into DoBlend(), so (aNextFrameIndex - 1)
|
|
// will always be a valid frame number.
|
|
if (mLastCompositedFrameIndex != int32_t(aNextFrameIndex - 1)) {
|
|
if (isFullPrevFrame && !prevFrame->GetIsPaletted()) {
|
|
// Just copy the bits
|
|
CopyFrameImage(prevFrameData.mRawData,
|
|
prevFrameData.mRect,
|
|
compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
} else {
|
|
if (needToBlankComposite) {
|
|
// Only blank composite when prev is transparent or not full.
|
|
if (prevFrameData.mHasAlpha || !isFullPrevFrame) {
|
|
ClearFrame(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
}
|
|
}
|
|
DrawFrameTo(prevFrameData.mRawData, prevFrameData.mRect,
|
|
prevFrameData.mPaletteDataLength,
|
|
prevFrameData.mHasAlpha,
|
|
compositingFrameData.mRawData,
|
|
compositingFrameData.mRect,
|
|
prevFrameData.mBlendMethod);
|
|
}
|
|
}
|
|
}
|
|
} else if (needToBlankComposite) {
|
|
// If we just created the composite, it could have anything in its
|
|
// buffers. Clear them
|
|
ClearFrame(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect);
|
|
}
|
|
|
|
// Check if the frame we are composing wants the previous image restored after
|
|
// it is done. Don't store it (again) if last frame wanted its image restored
|
|
// too
|
|
if ((nextFrameData.mDisposalMethod == DisposalMethod::RESTORE_PREVIOUS) &&
|
|
(prevFrameData.mDisposalMethod != DisposalMethod::RESTORE_PREVIOUS)) {
|
|
// We are storing the whole image.
|
|
// It would be better if we just stored the area that nextFrame is going to
|
|
// overwrite.
|
|
if (!mCompositingPrevFrame) {
|
|
RefPtr<imgFrame> newFrame = new imgFrame;
|
|
nsresult rv = newFrame->InitForDecoder(mSize,
|
|
SurfaceFormat::B8G8R8A8);
|
|
if (NS_FAILED(rv)) {
|
|
mCompositingPrevFrame.reset();
|
|
return false;
|
|
}
|
|
|
|
mCompositingPrevFrame = newFrame->RawAccessRef();
|
|
}
|
|
|
|
AnimationData compositingPrevFrameData =
|
|
mCompositingPrevFrame->GetAnimationData();
|
|
|
|
CopyFrameImage(compositingFrameData.mRawData,
|
|
compositingFrameData.mRect,
|
|
compositingPrevFrameData.mRawData,
|
|
compositingPrevFrameData.mRect);
|
|
|
|
mCompositingPrevFrame->Finish();
|
|
}
|
|
|
|
// blit next frame into it's correct spot
|
|
DrawFrameTo(nextFrameData.mRawData, nextFrameData.mRect,
|
|
nextFrameData.mPaletteDataLength,
|
|
nextFrameData.mHasAlpha,
|
|
compositingFrameData.mRawData,
|
|
compositingFrameData.mRect,
|
|
nextFrameData.mBlendMethod);
|
|
|
|
// Tell the image that it is fully 'downloaded'.
|
|
mCompositingFrame->Finish();
|
|
|
|
mLastCompositedFrameIndex = int32_t(aNextFrameIndex);
|
|
|
|
return true;
|
|
}
|
|
|
|
//******************************************************************************
|
|
// Fill aFrame with black. Does also clears the mask.
|
|
void
|
|
FrameAnimator::ClearFrame(uint8_t* aFrameData, const nsIntRect& aFrameRect)
|
|
{
|
|
if (!aFrameData) {
|
|
return;
|
|
}
|
|
|
|
memset(aFrameData, 0, aFrameRect.width * aFrameRect.height * 4);
|
|
}
|
|
|
|
//******************************************************************************
|
|
void
|
|
FrameAnimator::ClearFrame(uint8_t* aFrameData, const nsIntRect& aFrameRect,
|
|
const nsIntRect& aRectToClear)
|
|
{
|
|
if (!aFrameData || aFrameRect.width <= 0 || aFrameRect.height <= 0 ||
|
|
aRectToClear.width <= 0 || aRectToClear.height <= 0) {
|
|
return;
|
|
}
|
|
|
|
nsIntRect toClear = aFrameRect.Intersect(aRectToClear);
|
|
if (toClear.IsEmpty()) {
|
|
return;
|
|
}
|
|
|
|
uint32_t bytesPerRow = aFrameRect.width * 4;
|
|
for (int row = toClear.y; row < toClear.y + toClear.height; ++row) {
|
|
memset(aFrameData + toClear.x * 4 + row * bytesPerRow, 0,
|
|
toClear.width * 4);
|
|
}
|
|
}
|
|
|
|
//******************************************************************************
|
|
// Whether we succeed or fail will not cause a crash, and there's not much
|
|
// we can do about a failure, so there we don't return a nsresult
|
|
bool
|
|
FrameAnimator::CopyFrameImage(const uint8_t* aDataSrc,
|
|
const nsIntRect& aRectSrc,
|
|
uint8_t* aDataDest,
|
|
const nsIntRect& aRectDest)
|
|
{
|
|
uint32_t dataLengthSrc = aRectSrc.width * aRectSrc.height * 4;
|
|
uint32_t dataLengthDest = aRectDest.width * aRectDest.height * 4;
|
|
|
|
if (!aDataDest || !aDataSrc || dataLengthSrc != dataLengthDest) {
|
|
return false;
|
|
}
|
|
|
|
memcpy(aDataDest, aDataSrc, dataLengthDest);
|
|
|
|
return true;
|
|
}
|
|
|
|
nsresult
|
|
FrameAnimator::DrawFrameTo(const uint8_t* aSrcData, const nsIntRect& aSrcRect,
|
|
uint32_t aSrcPaletteLength, bool aSrcHasAlpha,
|
|
uint8_t* aDstPixels, const nsIntRect& aDstRect,
|
|
BlendMethod aBlendMethod)
|
|
{
|
|
NS_ENSURE_ARG_POINTER(aSrcData);
|
|
NS_ENSURE_ARG_POINTER(aDstPixels);
|
|
|
|
// According to both AGIF and APNG specs, offsets are unsigned
|
|
if (aSrcRect.x < 0 || aSrcRect.y < 0) {
|
|
NS_WARNING("FrameAnimator::DrawFrameTo: negative offsets not allowed");
|
|
return NS_ERROR_FAILURE;
|
|
}
|
|
// Outside the destination frame, skip it
|
|
if ((aSrcRect.x > aDstRect.width) || (aSrcRect.y > aDstRect.height)) {
|
|
return NS_OK;
|
|
}
|
|
|
|
if (aSrcPaletteLength) {
|
|
// Larger than the destination frame, clip it
|
|
int32_t width = std::min(aSrcRect.width, aDstRect.width - aSrcRect.x);
|
|
int32_t height = std::min(aSrcRect.height, aDstRect.height - aSrcRect.y);
|
|
|
|
// The clipped image must now fully fit within destination image frame
|
|
NS_ASSERTION((aSrcRect.x >= 0) && (aSrcRect.y >= 0) &&
|
|
(aSrcRect.x + width <= aDstRect.width) &&
|
|
(aSrcRect.y + height <= aDstRect.height),
|
|
"FrameAnimator::DrawFrameTo: Invalid aSrcRect");
|
|
|
|
// clipped image size may be smaller than source, but not larger
|
|
NS_ASSERTION((width <= aSrcRect.width) && (height <= aSrcRect.height),
|
|
"FrameAnimator::DrawFrameTo: source must be smaller than dest");
|
|
|
|
// Get pointers to image data
|
|
const uint8_t* srcPixels = aSrcData + aSrcPaletteLength;
|
|
uint32_t* dstPixels = reinterpret_cast<uint32_t*>(aDstPixels);
|
|
const uint32_t* colormap = reinterpret_cast<const uint32_t*>(aSrcData);
|
|
|
|
// Skip to the right offset
|
|
dstPixels += aSrcRect.x + (aSrcRect.y * aDstRect.width);
|
|
if (!aSrcHasAlpha) {
|
|
for (int32_t r = height; r > 0; --r) {
|
|
for (int32_t c = 0; c < width; c++) {
|
|
dstPixels[c] = colormap[srcPixels[c]];
|
|
}
|
|
// Go to the next row in the source resp. destination image
|
|
srcPixels += aSrcRect.width;
|
|
dstPixels += aDstRect.width;
|
|
}
|
|
} else {
|
|
for (int32_t r = height; r > 0; --r) {
|
|
for (int32_t c = 0; c < width; c++) {
|
|
const uint32_t color = colormap[srcPixels[c]];
|
|
if (color) {
|
|
dstPixels[c] = color;
|
|
}
|
|
}
|
|
// Go to the next row in the source resp. destination image
|
|
srcPixels += aSrcRect.width;
|
|
dstPixels += aDstRect.width;
|
|
}
|
|
}
|
|
} else {
|
|
pixman_image_t* src =
|
|
pixman_image_create_bits(
|
|
aSrcHasAlpha ? PIXMAN_a8r8g8b8 : PIXMAN_x8r8g8b8,
|
|
aSrcRect.width, aSrcRect.height,
|
|
reinterpret_cast<uint32_t*>(const_cast<uint8_t*>(aSrcData)),
|
|
aSrcRect.width * 4);
|
|
pixman_image_t* dst =
|
|
pixman_image_create_bits(PIXMAN_a8r8g8b8,
|
|
aDstRect.width,
|
|
aDstRect.height,
|
|
reinterpret_cast<uint32_t*>(aDstPixels),
|
|
aDstRect.width * 4);
|
|
|
|
auto op = aBlendMethod == BlendMethod::SOURCE ? PIXMAN_OP_SRC
|
|
: PIXMAN_OP_OVER;
|
|
pixman_image_composite32(op,
|
|
src,
|
|
nullptr,
|
|
dst,
|
|
0, 0,
|
|
0, 0,
|
|
aSrcRect.x, aSrcRect.y,
|
|
aSrcRect.width, aSrcRect.height);
|
|
|
|
pixman_image_unref(src);
|
|
pixman_image_unref(dst);
|
|
}
|
|
|
|
return NS_OK;
|
|
}
|
|
|
|
} // namespace image
|
|
} // namespace mozilla
|